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WO1996029412A1 - Proteine de surface de neisseria meningitidis resistant a la proteinase k - Google Patents

Proteine de surface de neisseria meningitidis resistant a la proteinase k Download PDF

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Publication number
WO1996029412A1
WO1996029412A1 PCT/CA1996/000157 CA9600157W WO9629412A1 WO 1996029412 A1 WO1996029412 A1 WO 1996029412A1 CA 9600157 W CA9600157 W CA 9600157W WO 9629412 A1 WO9629412 A1 WO 9629412A1
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WO
WIPO (PCT)
Prior art keywords
seq
neisseria
protein
meningi tidis
neisseria meningi
Prior art date
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PCT/CA1996/000157
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English (en)
Inventor
Bernard R. Brodeur
Denis Martin
Josée Hamel
Clément Rioux
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Biochem Vaccines Inc.
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Priority to EA199700248A priority Critical patent/EA001789B1/ru
Priority to SK1255-97A priority patent/SK287456B6/sk
Priority to PL96322363A priority patent/PL184373B1/pl
Priority to AT96905629T priority patent/ATE431413T1/de
Priority to SI9620035A priority patent/SI9620035A/sl
Priority to JP8527928A priority patent/JPH11500624A/ja
Priority to BRPI9607651-8B8A priority patent/BR9607651B8/pt
Priority to CA2215161A priority patent/CA2215161C/fr
Priority to NZ303118A priority patent/NZ303118A/en
Priority to APAP/P/1997/001118A priority patent/AP1027A/en
Priority to EP96905629A priority patent/EP0815234B8/fr
Application filed by Biochem Vaccines Inc. filed Critical Biochem Vaccines Inc.
Priority to AU49343/96A priority patent/AU716225B2/en
Priority to RO97-01730A priority patent/RO117924B1/ro
Priority to DE69637929T priority patent/DE69637929D1/de
Priority to MX9707061A priority patent/MX9707061A/es
Publication of WO1996029412A1 publication Critical patent/WO1996029412A1/fr
Priority to NO19974264A priority patent/NO326425B1/no
Priority to HK99100097.4A priority patent/HK1014991A1/xx
Priority to US09/684,883 priority patent/US7273611B1/en
Priority to US11/582,527 priority patent/US7786286B2/en
Priority to US11/929,892 priority patent/US20080124353A1/en
Priority to US11/929,893 priority patent/US7833717B2/en
Priority to US11/929,890 priority patent/US20080107674A1/en
Priority to US11/929,902 priority patent/US20080107676A1/en
Priority to US11/929,887 priority patent/US7749499B2/en
Priority to US11/929,886 priority patent/US7776335B2/en

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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/02—Bacterial antigens
    • A61K39/095—Neisseria
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A61K38/16—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
    • A61P31/04—Antibacterial agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
    • C07K14/22—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Neisseriaceae (F)
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/70—Vectors or expression systems specially adapted for E. coli
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
    • A61K2039/52—Bacterial cells; Fungal cells; Protozoal cells
    • A61K2039/522—Bacterial cells; Fungal cells; Protozoal cells avirulent or attenuated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies

Definitions

  • This invention relates to a highly conserved, immunologically accessible antigen at the surface of Neisseria meningi tidis organisms.
  • This unique antigen provides the basis for new immunotherapeutic, prophylactic and diagnostic agents useful in the treatment, prevention and diagnosis of Neisseria meningi tidis diseases.
  • this invention relates to a proteinase K resistant Neisseria meningi tidis surface protein having an apparent molecular weight of 22 kDa, the corresponding nucleotide and derived amino acid sequences (SEQ ID NO: 1 to SEQ ID NO:26), recombinant DNA methods for the production of the Neisseria meningi tidis 22 kDa surface protein, antibodies that bind to the Neisseria meningi tidis 22 kDa surface protein and methods and compositions for the diagnosis, treatment and prevention of Neisseria meningi tidis diseases.
  • Neisseria meningi tidis is a major cause of death and morbidity throughout the world. Neisseria meningi tidis causes both endemic and epidemic diseases, principally meningitis and meningococcemia [Gold, Evolution of meningococcal disease, p. 69, Vedros N.A. , CRC Press (1987) ; Schwartz et al . , Clin. Microbiol . Rev., 2 , p. S118 (1989)] . In fact, this organism is one of the most common causes, after Haemophilus influen ⁇ ae type b, of bacterial meningitis in the United States, accounting for approximately 20% of all cases.
  • Neisseria meningi tidis are subdivided into serological groups according to the presence of capsular antigens. Currently, 12 serogroups are recognized, but serogroups A, B, C, Y, and W-135 are most commonly found. Within serogroups, serotypes, subtypes and immunotypes cam be identified on outer membrane proteins and lipopolysaccharide [Frasch et al . , Rev. Infect. Pis. 7, p. 504 (1985) ] .
  • the capsular polysaccharide vaccines presently available are not effective against all Neisseria meningi tidis isolates and do not effectively induce the production of protective antibodies in young infants [Frasch, Clin. Microbiol. Rev. 2, p. S134 (1989); Reingold et al., Lancet, p. 114 (1985); Zollinger, in Woodrow and Levine, New generation vaccines, p. 325, Marcel Dekker Inc. N.Y. (1990)] .
  • the capsular polysaccharide of serogroups A, C, Y and W-135 are presently used in vaccines against this organism. These polysaccharide vaccines are effective in the short term, however the vaccinated subjects do not develop an immunological memory, so they must be revaccinated within a three-year period to maintain their level of resistance.
  • Neisseria meningi tidis surface antigens such as lipopolysacchari ⁇ e, pili proteins and proteins present in the outer membrane are under investigation.
  • the presence of a human immune response and bactericidal antibodies against certain of these proteinaceous surface antigens in the sera of immunized volunteers and convalescent patients was demonstrated [Mandrell and Zollinger, Infect . Immun. , 57, p. 1590 (1989); Poolman et al. , Infect. Immun. , 40, p. 398 (1983) ; Rosenquist et al. , J. Clin. Microbiol., 26, p. 1543 (1988); Wedege and Froholm, Infect. Immun. 51, p. 571 (1986); Wedege and Michaelsen, J. Clin. Microbiol.,
  • Antigen preparations based on Neisseria meningi tidis outer membrane proteins have demonstrated immunogenic effects in animals and in humans and some of them have been tested in clinical trials [Bjune et al . , Lancet, p. 1093 (1991); Costa et al. , NIPH Annals, 14, p. 215 (1991) ; Frasch et al. , Med. Tro . , 43, p. 177 (1982); Frasch et al. , Eur. J. Clin. Microbiol., 4, p. 533 (1985) ; Frasch et al. in Robbins, Bacterial Vaccines, p. 262, Praeger Publications, N.Y.
  • Neisseria meningi tidis strains that would be capable of eliciting bactericidal antibodies in order to develop a broad spectrum vaccine.
  • the current laboratory diagnosis of Neisseria meningi tidis is usually done by techniques such as Gram stain of smear preparations, latex agglutination or coagglutination, and the culture and isolation on enriched and selective media [Morello et al . , in Balows, Manual of Clinical Microbiology, p. 258, American Society for Microbiology, Washington (1991)] .
  • Carbohydrate degradation tests are usually performed to confirm the ' identification of Neisseria meningi tidis isolates. Most of the described procedures are time-consuming processes requiring trained personnel.
  • Commercial agglutination or coagglutination kits containing polyvalent sera directed against the capsular antigens expressed by the most prevalent serogroups are used for the rapid identification of Neisseria meningi tidis .
  • these polyvalent sera often nonspecifically cross-react with other bacterial species and for that reason should always be used in conjunction with Gram stain and culture. Accordingly, there is a need for efficient alternatives to these diagnostic assays that will improve the rapidity and reliability of the diagnosis.
  • the present invention solves the problems referred to above by providing a highly conserved, immunologically accessible antigen at the surface of Neisseria meningi tidis organisms. Also provided are recombinant PNA molecules that code for the foregoing antigen, unicellular hosts transformed with those PNA molecules, and a process for making substantially pure, recombinant antigen. Also provided are antibodies specific to the foregoing Neisseria meningi tidis antigen. The antigen and antibodies of this invention provide the basis for unique methods and pharmaceutical compositions for the detection, prevention and treatment of Neisseria meningi tidis diseases .
  • the preferred antigen is the Neisseria meningi tidis 22 kPa surface protein, including fragments, analogues and derivatives thereof.
  • the preferred antibodies are the Me- 1 and Me-7 monoclonal antibodies specific to the Neisseria meningi tidis 22 kPa surface protein. These antibodies are highly bacteriolytic against Neisseria meningi tidis and passively protect mice against experimental infection.
  • the present invention further provides methods for isolating novel Neisseria meningi tidis surface antigens and antibodies specific thereto.
  • Figure 1 depicts the nucleotide and derived amino acid sequences of the Neisseria meningi tidis strain 608B 22 kPa surface protein (SEQ ID NO:1; SEQ ID NO:2) . Conventional three letter symbols are used for the amino acid residues.
  • the open reading frame extends from the start codon at base 143 to the stop codon at base 667.
  • the box indicates the putative ribosome binding site whereas the putative -10 promoter sequence is underlined.
  • a 19- amino-acid signal peptide is also underlined.
  • Figure 2 is a photograph of a Coomassie Blue stained 14% SDS-PAGE gel displaying ⁇ -chymotrypsin and trypsin digests of Neisseria meningi tidis strain 608B (B:2a:PI.2) outer membrane preparations.
  • Lane 1 contains the following molecular weight markers : Phosphorylase b (97,400); bovine serum albumin (66,200); ovalbumin (45,000); carbonic anhydrase (31,000) ; soybean trypsin inhibitor (21,500) ; and lysozyme (14,400) .
  • Lane 2 contains undigested control outer membrane preparation.
  • Lane 3 contains ⁇ -chymotrypsin treated preparation (2mg of enzyme per mg of protein) ;
  • lane 4 contains trypsin treated preparation.
  • Figure 3a is a photograph of a Coommasie Blue stained 14% SDS-PAGE gel displaying proteinase K digests of Neisseria meningi tidis strain 608B (B:2a:PI.2) outer membrane preparations. Lanes 1, 3, 5, and 7 contain undigested control. Lanes 2, 4, 6 and 8 contain outer membrane preparations digested with proteinase K (2 IU per mg of protein) . Lanes 1 to 4 contain preparations treated at pH 7.2. Lanes 5 to 8 contain preparations treated at pH 9.0. Lanes 1, 2, 5 and 6 contain preparations treated without SDS . Lanes 3, 4, 7 and 8 contain preparations treated in the presence of SDS. Molecular weight markers are indicated on the left (in kilodaltons) .
  • Figure 3b is a photograph of a Coomassie Blue stained 14% SDS-PAGE gel displaying the migration profiles of affinity purified recombinant 22 kDa protein.
  • Lane 1 contains molecular weight markers : Phosphorylase b (97,400), bovine serum albumin (66,200), ovalbumin (45,000) , carbonic anhydrase (31,000), soybean trypsin inhibitor (21,500) and lysozyme (14,400) .
  • Lane 2 contains 5 ⁇ g of control affinity purified recombinant 22 kDa protein.
  • Lane 3 contains 5 ⁇ g of affinity purified recombinant 22 kPa protein heated at 100°C for 5 min. .
  • Lane 4 contains 5 ⁇ g of affinity purified recombinant 22 kDa protein heated at 100°C for 10 min. .
  • Lane 5 contains 5 ⁇ g of affinity purified recombinant 22 kDa protein heated at 100°C for 15 min.
  • Figure 4 is a photograph of Coomassie Blue stained 14% SDS-PAGE gels and their corresponding Western immunoblots showing the reactivity of monoclonal antibodies specific to the Neisseria meningi tidis 22 kDa surface protein.
  • Outer membrane preparation from Neisseria meningi tidis strain 608B (B:2a:PI.2) (A) untreated; (B) Proteinase K treated (2 IU per mg of protein) .
  • Lane 1 contains molecular weight markers and characteristic migration profile on 14% SDS-PAGE gel of outer membrane preparations .
  • Lane 2 contains Me-2; Lane 3 contains Me-3 ; lane 4 contains Me-5; lane 5 contains Me-7 ; and lane 6 contains an unrelated control monoclonal antibody.
  • the molecular weight markers are phosphorylase b (97,400), bovine serum albumin (66,200), ovalbumin (45,000), carbonic anhydrase (31,000), soybean trypsin • inhibitor (21,500) and lysozyme (14,400) .
  • the immunoblot results shown in Figure 4 for Me-2, Me-5, Me-5, Me-6 and Me-7 are consistent with the immunoblot results obtained for Me-1.
  • Figure 5 is a graphic depiction of the binding activity of the monoclonal antibodies to intact bacterial cells.
  • the results for representative monoclonal antibodies Me-5 and Me-7 are presented in counts per minute ("CPM") on the vertical axis.
  • the various bacterial strains used in the assay are shown on the horizontal axis.
  • a Haemophilus influenzae porin-specific monoclonal antibody was used as a negative control.
  • Figure 6 is a photograph of stained 14% SDS-PAGE gels and their corresponding Western immunoblot demonstrating the purification of the recombinant 22 kDa Neisseria meningi tidis surface protein from concentrated culture supernatant of Escherichia coli strain BL2KDE3) .
  • Figure 6(A) is a photograph of a Coomassie Blue and silver stained 14% SDS-Page gel. Lane 1 contains the following molecular weight markers: phosphorylase b (97,400), bovine serum albumin (66,200), ovalbumin (45,000) , carbonic anhydrase (31,000), soybean trypsin inhibitor (21,500) and lysozyme (14,400) .
  • Lane 2 contains outer membrane protein preparation extracted from Neisseria meningitidis strain 608B (serotype B:2a:pl.2) (10 mg) .
  • Lane 3 contains concentrated culture supernatant of Escherichia coli BL21(DE3) (10 mg) .
  • Lane 4 contains affinity purified recombinant 22 kDa Neisseria meningi tidis surface protein (1 mg) .
  • Figure 6(B) is a photograph of a Coomassie Blue stained 14% SPS-PAGE gel of ⁇ -chymotrypsin, trypsin and proteinase K digests of affinity purified recombinant 22 kPa Neisseria meningi tidis surface protein.
  • Lane 1 contains the following molecular weight markers : phosphorylase b (97,400) , bovine serum albumin (66,200) , ovalbumin (45,000), carbonic anhydrase (31,000), soybean trypsin inhibitor (21,500) and lysozyme (14,400) .
  • Lanes 2 to 5 contain purified recombinant 22 kDa Neisseria meningi tidis surface protein (2 mg) .
  • Lanes 7 to 10 contain bovine serum albumin (2 mg) .
  • Lanes 2 and 7 contain undigested protein (“NT”) .
  • Lanes 3 and 8 contain ⁇ -chymotrypsin ("C”) treated protein (2 mg of enzyme per mg of protein) .
  • Lanes 4 and 9 contain trypsin ( "T” ) treated protein (2 mg of enzyme per mg of protein) .
  • Lanes 5 and 10 contain proteinase K ("K”) treated protein (2 IU per mg of protein) .
  • Figure 6 (C) is a photograph of the
  • Figure 7 is a graphical depiction of the bactericidal activity of protein A-purified anti-Neisseria meningi tidis 22 kDa surface protein monoclonal antibodies against Neisseria meningi tidis strain 608B (B:2a:P1.2) .
  • the vertical axis of the graph shows the percentage of survival of the Neisseria meningi tidis bacteria after exposure to various concentrations of monoclonal antibody (shown on the horizontal axis of the graph) .
  • Figure ⁇ depicts the nucleotide and derived amino acid sequences of the Neisseria meningi tidis strain MCH88 22 kDa surface protein (SEQ ID NO:3; SEQ ID NO:4) . Conventional three letter symbols are used for the amino acid residues. The open reading frame extends from the start codon at base 116 to the stop codon at base 643.
  • Figure 9 depicts the nucleotide and derived amino acid sequences of the Neisseria meningi tidis strain Z4063 22 kDa surface protein (SEQ ID NO:5; SEQ ID NO:6) .
  • Figure 10 depicts the nucleotide and derived amino acid sequences of the Neisseria gonorrhoeae strain b2, 22 kDa surface protein (SEQ ID NO:7 ; SEQ ID NO:8) . Conventional three letter symbols are used for the ammo acid residues.
  • the open reading frame extends from the start codon at base 241 to the stop codon at base 765.
  • Figure 11 depicts the consensus sequence established from the DNA sequences of the four strains of Neisseria and indicates the substitutions or insertion of nucleotides specific to each strain.
  • Figure 12 depicts the consensus sequence established from the protein sequences of the four strains of
  • Neisseria indicates the substitutions or insertion of amino acid residues specific to each strain.
  • Figure 13 represents the time course of the immune response to the recombinant 22 kDa protein in rabbits expressed as the reciprocal ELISA titer.
  • the rabbits were injected with outer membrane preparations from E. coli strain JM109 with plasmid pN2202 or with control plasmid pWKS30.
  • the development of the specific humoral response was analysed by ELISA using outer membrane preparations obtained from Neisseria meningi tidis strain 608B (B:2a:PI.2) as coating antigen.
  • Figure 14 represents the time course of the immune response to the recombinant 22kDa protein in Macaca fascicularis (cynomolgus) monkeys expressed as the reciprocal ELISA titer.
  • the two monkeys were respectively immunized with lOO ⁇ g (K28) and 200 ⁇ g (1276) of affinity purified 22kDa protein per injection.
  • the control monkey (K65) was immunized with 150 ⁇ g of unrelated recombinant protein following the same procedure.
  • the development of the specific humoral response was analysed by ELISA using outer membrane preparations obtained from Neisseria meningi tidis strain 608B (B:2a:Pi.2) as coating antigen.
  • Figure 15 is a graphic representation of the synthetic peptides of the invention as well as their respective position in the full 22kDa protein of Neisseria meningi tidis strain 608B (B:2a.-PI.2) .
  • Figure 16 is a map of plasmid pNP2204 containing the gene which encodes the Neisseria meningi tidis 22 kDa surface protein 22kDa, Neisseria meningi tidis 22 kDa surface protein gene; Ampi p , ampicillin-resistance coding region; ColEl, origin of replication; cI857, bacteriophage ⁇ cI857 temperature-sensitive repressor gene; ⁇ PL, bacteriophage ⁇ transcription promoter; Tl transcription terminator. The direction of transcription is indicated by the arrows. Bglll and BamHI are the restriction sites used to insert the 22 kDa gene in the p629 plasmid.
  • Proteinase K resistant proteins have been found in Leptospira species [Nicholson, V.M. and J.F. Prescott, Veterinary Microbiol . (1993) 36:123-138], Mycoplasma species [Butler, G.H. et al . Infec . Immun. (1991) 59:1037-1042], Spiroplasma mi um [Bastian, F.O. et al. J. Clin. Microbiol. (1987) 25:2430- 2431] and in viruses and prions [Onodera, T. et al. Microbiol . Immunol.
  • Neisseria meningi tidis surface protein means any Neisseria meningi tidis surface protein encoded by a naturally occurring Neisseria meningi tidis gene.
  • the Neisseria meningi tidis protein according to the invention may be of natural origin, or may be obtained through the application of molecular biology with the object of producing a recombinant protein, or fragment thereof.
  • “highly conserved” means that the gene for the Neisseria meningi tidis surface protein and the protein itself exist in greater than 50% of known strains of Neisseria meningi tidis .
  • the gene and its protein exist in greater than 99% of known strains of Neisseria meningi tidis .
  • Examples 2 and 4 set forth methods by which one of skill in the art would be able to test a variety of different Neisseria meningitidis surface proteins to determine if they are "highly conserved” .
  • "immunologically accessible” means that the Neisseria meningi tidis surface protein is present at the surface of the organism and is accessible to antibodies .
  • Example 2 sets forth methods by which one of skill in the art would be able to test a variety of different Neisseria meningi tidis surface proteins to determine if they are "immunologically accessible”.
  • Immunological accessibility may be determined by other methods, including an agglutination assay, an ELISA, a RIA, an immunoblotting assay, a dot-enzyme assay, a surface accessibility assay, electron microscopy, or a combination of these assays .
  • fragments of the Neisseria meningi tidis surface protein include polypeptides having at least one peptide epitope, or analogues and derivatives thereof. Peptides of this type may be obtained through the application of molecular biology or synthesized using conventional liquid or solid phase peptide synthesis techniques.
  • analogues of the Neisseria meningi tidis surface protein include those proteins, or fragments thereof, wherein one or more amino acid residues in the naturally occurring sequence is replaced by another amino acid residue, providing that the overall functionality and protective properties of this protein are preserved.
  • Such analogues may be produced synthetically, or by recombinant DNA technology, for example, by mutagenesis of a naturally occurring Neisseria meningi tidis surface protein. Such procedures are well known in the art.
  • one such analogue is selected from the recombinant protein that may be produced from the gene for the 22kDa protein from Neisseria gonorrhoeae strain b2, as depicted in Figure 10.
  • a further analog may be obtained from the isolation of the corresponding gene from Neisseria lactamica .
  • a "derivative" of the Neisseria meningitidis surface protein is a protein or fragment thereof that has been covalently modified, for example, with dinitrophenol, in order to render it immunogenic in humans.
  • the derivatives of this invention also include derivatives of the amino acid analogues of this invention. It will be understood that by following the examples of this invention, one of skill in the art may determine without undue experimentation whether a particular fragment, analogue or derivative would be useful in the diagnosis, prevention or treatment of Neisseria meningitidis diseases.
  • This invention also includes polymeric forms of the Neisseria meningi tidis surface proteins, fragments, analogues and derivatives.
  • polymeric forms include, for example, one or more polypeptides that have been crosslinked with crosslinkers such as avidin/biotin, gluteraldehyde or dimethylsuberimidate. Such polymeric forms also include polypeptides containing two or more tandem or inverted contiguous Neisseria meningi tidis sequences, produced from multicistronic mRNAs generated by recombinant DNA technology.
  • This invention provides substantially pure Neisseria meningitidis surface proteins.
  • the term "substantially pure” means that the Neisseria meningitidis surface protein according to the invention is free from other proteins of Neisseria meningi tidis origin.
  • Substantially pure Neisseria meningi tidis surface protein preparations can be obtained by a variety of conventional processes, for example the procedure described in Examples 3 and 11.
  • the invention particularly provides a 22 kDa surface protein of Neisseria meningi tidis having the amino acid sequence of Figure 1 (SEQ ID NO:2), or a fragment, analogue or derivative thereof.
  • the invention particularly provides a 22 kPa surface protein of Neisseria meningi tidis having the amino acid sequence of Figure 8 (SEQ IP NO:4), Figure 9 (SEQ IP NO:6) or a fragment, analogue or derivative thereof .
  • a fragment may be selected from the peptides listed in Figure 15 (SEQ IP NO:9 to SEQ ID NO:26) .
  • the invention provides a 22kDa surface protein of Neisseria gonorrhoeae having the amino acid sequence of Figure 10 (SEQ ID NO:8), or a fragment, analogue or derivative thereof.
  • any reference to the Neisseria meningi tidis 22kDa protein also encompasses 22kDa proteins isolated from, or made from genes isolated from other species of Neisseriacae such as Neisseria gonorrhoeae or Neisseria lactamica .
  • a Neisseria meningi tidis 22 kDa surface protein according to the invention may be further characterized by one or more of the following features:
  • proteolytic enzymes such as ⁇ -chymotrypsin, trypsin and proteinase K;
  • periodate oxidation does not abolish the specific binding of antibody directed against the Neisseria meningi tidis 22 kDa surface protein
  • This invention also provides, for the first time, a DNA sequence coding for the Neisseria meningi tidis 22 kDa surface protein (SEQ ID NO:l, NO:3 , NO: 5, and NO:7 ) .
  • the preferred DNA sequences of this invention are selected from the group consisting of: (a) the DNA sequence of Figure 1 (SEQ ID NO:l)
  • Such fragments are preferably peptides as depicted in Figure 15 (SEQ ID NO:9, through SEQ ID NO:26) .
  • this invention also provides, for the first time, a DNA sequence coding for the Neisseria meningi tidis 22 kDa surface protein (SEQ ID NO:l) . More preferred DNA sequences of this invention are selected from the group consisting of:
  • DNA sequences degenerate to any of the foregoing DNA sequences; and (d) fragments of any of the foregoing DNA sequences; wherein said sequences encode a product that displays the immunological activity of the Neisseria meningi tidis 22 kDa surface protein.
  • Analogues and derivatives of the Neisseria meningi tidis 22 kDa surface protein coding gene will hybridize to the 22 kDa surface protein-coding gene under the conditions described in Example 4.
  • the fragments, analogues and derivatives of the Neisseria meningi tidis 22 kDa surface protein have the "immunological activity" of the Neisseria meningi tidis 22 kDa surface protein if they can induce, when injected into an animal host, the development of an immunological response that can protect against Neisseria meningi tidis infection.
  • One of skill in the art may determine whether a particular DNA sequence encodes a product that displays the immunological activity of the Neisseria meningi tidis 22 kDa surface protein by following the procedures set forth herein in Example 6.
  • Neisseria meningi tidis surface proteins of this invention may be isolated by a method comprising the following steps: a) isolating a culture of Neisseria meningi tidis bacteria, b) isolating an outer membrane portion from the culture of the bacteria; and c) isolating said antigen from the outer membrane portion.
  • step (c) may include the additional steps of treating the Neisseria meningi tidis outer membrane protein extracts with proteinase K, followed by protein fractionation using conventional separation techniques such as ion exchange and gel chromatography and electrophoresis.
  • the Neisseria meningi tidis surface proteins of this invention may be produced by the use of molecular biology techniques, as more particularly described in Example 3 herein.
  • the use of molecular biology techniques is particularly well- • suited for the preparation of substantially pure recombinant Neisseria meningi tidis 22 kDa surface protein.
  • a process for the production of recombinant Neisseria meningi tidis 22 kDa surface protein, including fragments, analogues and derivatives thereof comprising the steps of (1) culturing a unicellular host organism transformed with a recombinant DNA molecule including a DNA sequence coding for said protein, fragment, analogue or derivative and one or more expression control sequences operatively linked to the DNA sequence, and (2) recovering a substantially pure protein, fragment, analogue or derivative.
  • the gene in order to obtain high expression levels of a transfected gene in a host, the gene must be operatively linked to transcriptional and translational expression control sequences that are functional in the chosen expression host.
  • the expression control sequences, and the gene of interest will be contained in an expression vector that further comprises a bacterial selection marker and origin of replication. If the expression host is a eukaryotic cell, the expression vector should further comprise an expression marker useful in the expression host.
  • Useful expression vectors for eukaryotic hosts include, for example, vectors comprising expression control sequences from SV40, bovine papilloma virus, adenovirus and cytomegalovirus.
  • Useful expression vectors for bacterial hosts include known bacterial plasmids, such as plasmids from E.coli, including col El, pCRl, pBR322, pMB9 and their derivatives, wider host range plasmids, such as RP4, phage DNAs, e.g., the numerous derivatives of phage lambda, e.g.
  • Useful expression vectors for yeast cells include the 2 mu plasmid and derivatives thereof.
  • Useful vectors for insect cells include pVL 941.
  • any of a wide variety of expression control sequences may be used in these vectors to express the DNA sequences of this invention.
  • useful expression control sequences include the expression control sequences associated with structural genes of the foregoing expression vectors.
  • useful expression control sequences include, for example, the early and late promoters of SV40 or adenovirus, the lac system, the trp system, the TAC or TRC system, the major operator and promoter regions of phage lambda, the control regions of fd coat protein, the promoter for 3- phosphoglycerate kinase or other glycolytic enzymes, the promoters of acid phosphatase, e.g., Pho5, the promoters of the yeast alpha-mating system and other sequences known to control expression of genes of prokaryotic and eukaryotic cells or their viruses, and various combinations thereof.
  • the Neisseria meningi tidis 22 kDa surface protein's expression control sequence is particularly useful in the expression of the Neisseria meningi tidis 22 kPa surface protein in E.coli (Example 3) .
  • Host cells transformed with the foregoing vectors form a further aspect of this invention.
  • a wide variety of unicellular host cells are useful in expressing the PNA sequences of this invention.
  • These hosts may include well known eukaryotic and prokaryotic hosts, such as strains of E. coli , Pseudomonas , Bacillus, Streptomyces, fungi, yeast, insect cells such as Spodoptera frugiperda (SF9) , animal cells such as CHO and mouse cells, African green monkey cells such as COS 1, COS 7, BSC 1, BSC 40, and BMT 10, and human cells and plant cells in tissue culture.
  • Preferred host organisms include bacteria such as E. coli and Bacillus subtilis and mammalian cells in tissue culture.
  • Unicellular hosts should be selected by consideration of their compatibility with the chosen vector, the toxicity of the product coded for by the DNA sequences of this invention, their secretion characteristics, their ability to fold the protein correctly, their fermentation or culture requirements, and the ease of purification from them of the products coded for by the DNA sequences of this invention.
  • polypeptides encoded by the DNA sequences of this invention may be isolated from the fermentation or cell culture and purified using any of a variety of conventional methods. One of skill in the art may select the most appropriate isolation and purification technr.ques without departing from the scope of this invention.
  • Neisseria meningi tidis surface proteins of this invention are useful in prophylactic, therapeutic and diagnostic compositions for preventing, treating and diagnosing diseases caused by Neisseria meningi tidis infection.
  • Neisseria meningi tidis surface proteins of this invention are useful in prophylactic, therapeutic and diagnostic compositions for preventing, treating and diagnosing diseases caused by Neisseria gonorrhoeae, or Neisseria lactamica infection.
  • Neisseria meningi tidis surface proteins according to this invention are particularly well-suited for the generation of antibodies and for the development of a protective response against Neisseria meningi tidis diseases .
  • Neisseria meningi tidis surface proteins are particularly well-suited for the generation of antibodies and for the development of a protective response against Neisseria gonorrhoeae or Neisseria lactamica diseases.
  • Neisseria meningi tidis 22 kDa surface protein having an amino acid sequence of Figure 1 (SEQ ID NO:2) or a fragment, analogue, or derivative thereof for use as an immunogen and as a vaccine.
  • Neisseria meningi tidis 22 kDa surface protein having an amino acid sequence of
  • Figure 1 SEQ ID N0:2
  • Figure 8 SEQ ID NO:4
  • Figure 9 SEQ ID NO:6
  • Figure 10 SEQ ID NO:8
  • Standard immunological techniques may be employed with the Neisseria meningi tidis surface proteins in order to use them as immunogens and as vaccines.
  • any suitable host may be injected with a pharmaceutically effective amount of the Neisseria meningi tidis 22 kDa surface protein to generate monoclonal or polyvalent anti- Neisseria meningi tidis antibodies or to induce the development of a protective immunological response against Neisseria meningi tidis diseases.
  • the Neisseria meningi tidis surface proteins may be formulated in a suitable vehicle, and thus we provide a pharmaceutical composition comprising one or more Neisseria meningi tidis surface antigens or fragments thereof.
  • the antigen is the Neisseria meningitidis 22 kDa surface protein or fragments, analogues or derivatives thereof together with one or more pharmaceutically acceptable excipients.
  • pharmaceutically effective amount refers to an amount of one or more Neisseria meningi tidis surface antigens or fragments thereof that elicits a sufficient titer of anti- Neisseria meningi tidis antibodies to treat or prevent Neisseria meningi tidis infection.
  • the Neisseria meningi tidis surface proteins of this invention may also form the basis of a diagnostic test for Neisseria meningi tidis infection.
  • this invention provides a method for the detection of Neisseria meningi tidis antigen in a biological sample containing or suspected of containing Neisseria meningi tidis antigen comprising: a) isolating the biological sample from a patient; b) incubating an anti-Neisseria meningi tidis 22 kPa surface protein antibody or fragment thereof with the biological sample to form a mixture; and c) detecting specifically bound antibody or bound fragment in the mixture which indicates the presence of
  • Neisseria meningi tidis antigen Neisseria meningi tidis antigen.
  • Preferred antibodies in the foregoing diagnostic method are Me-1 and Me-7.
  • this invention provides a method for the detection of antibody specific to Neisseria meningi tidis antigen in a biological sample containing or suspected of containing said antibody comprising: a) isolating the biological sample from a patient; b) incubating a Neisseria meningi tidis surface protein of this invention or fragment thereof with the biological sample to form a mixture; and c) detecting specifically bound antigen or bound fragment in the mixture which indicates the presence of antibody specific to Neisseria meningi tidis antigen.
  • this diagnostic test may take several forms, including an immunological test such as an enzyme-linked immunosorbent assay (ELISA) , a radioimmunoassay or a latex agglutination assay, essentially to determine whether antibodies specific for the protein are present in an organism.
  • an immunological test such as an enzyme-linked immunosorbent assay (ELISA)
  • ELISA enzyme-linked immunosorbent assay
  • radioimmunoassay or a latex agglutination assay
  • the P ⁇ A sequences of this invention may also be used to design P ⁇ A probes for use in detecting the presence of the pathogenic Neisseria bacteria in a biological suspected of containing such bacteria.
  • the detection method of this invention comprises the steps of: a) isolating the biological sample from a patient; b) incubating a DNA probe having a PNA sequence of this invention with the biological sample to form a mixture; and c) detecting specifically bound PNA probe in the mixture which indicates the presence of Neisseria bacteria.
  • Preferred PNA probes have the base pair sequence of Figure 1 (SEQ IP N0:1), Figure 8 (SEQ IP NO: ) , Figure 9 (SEQ ID NO:5), or Figure 10 (SEQ ID NO:7) , or consensus sequence of Figure 11 (SEQ ID NO:9) .
  • a more preferred DNA probe has the 525 base pair sequence of Figure 1 (SEQ ID NO:l) .
  • the DNA probes of this invention may also be used for detecting circulating Neisseria meningi tidis nucleic acids in a sample, for example using a polymerase chain reaction, as a method of diagnosing Neisseria meningi tidis infections.
  • the probe may be synthesized using conventional techniques and may be immobilized on a solid phase, or may be labeled with a detectable label.
  • a preferred DNA probe for this application is an oligomer having a sequence complementary to at least about 6 contiguous nucleotides of the Neisseria meningi tidis 22 kDa surface protein gene of Figure 1 (SEQ ID NO:l), Figure 8 (SEQ ID N0:3), Figure 9 (SEQ ID NO:5), Figure 10 (SEQ ID NO:7), or consensus sequence of Figure 11 (SEQ ID NO:9) .
  • a more preferred DNA probe for this application is an oligomer having a sequence complementary to at least about 6 contiguous nucleotides of the Neisseria meningi tidis 22 kDa surface protein gene of Figure 1 (SEQ IP NO:l) .
  • Another diagnostic method for the detection of Neisseria meningi tidis in a patient comprises the steps of: a) labeling an antibody of this invention or fragment thereof with a detectable label; b) administering the labeled antibody or labeled fragment to the patient; and c) detecting specifically bound labeled antibody or labeled fragment in the patient which indicates the presence of Neisseria meningi tidis .
  • Neisseria meningi tidis 22 kDa surface protein having an amino acid sequence which includes the sequence of Figure 1 (SEQ ID ⁇ O:2), Figure 8 (SEQ ID NO:4) , Figure 9 (SEQ ID NO:6), or Figure 10 (SEQ ID NO; 8), or portion thereof or an analogue thereof, covalently bound to an insoluble support.
  • Neisseria meningi tidis 22 kDa surface protein having an amino acid sequence which includes the sequence of Figure 1 (SEQ ID NO:2), or portion thereof or an analogue thereof, covalently bound to an insoluble support.
  • a further feature of the invention is the use of the Neisseria meningi tidis surface proteins of this invention as immunogens for the production of specific antibodies for the diagnosis and in particular the treatment of Neisseria meningi tidis infection.
  • Suitable antibodies may be determined using appropriate screening methods, for example by measuring the ability of a particular antibody to passively protect against Neisseria meningi tidis infection in a test model.
  • One example of an animal model is the mouse model described in the Examples herein.
  • the antibody may be a whole antibody or an antigen-binding fragment thereof and may in general belong to any immunoglobulin class.
  • the antibody or fragment may be of animal origin, specifically of mammalian origin and more specifically of murine, rat or human origin.
  • the term recombinant antibody or antibody fragment means antibody or antibody fragment which were produced using molecular biology techniques .
  • the antibody or antibody fragments may be of polyclonal, or preferentially, monoclonal origin. It may be specific for a number of epitopes associated with the Neisseria meningi tidis surface proteins but it is preferably specific for one. Preferably, the antibody or fragments thereof will be specific for one or more epitopes associated with the Neisseria meningi tidis 22 kDa surface protein. Also preferred are the monoclonal antibodies Me-1 and Me-7 described herein.
  • Example 1 describes the treatment of Neisseria meningi tidis outer membrane preparation with proteolytic enzymes and the subsequent identification of the Neisseria meningi tidis 22 kDa surface protein.
  • Example 2 describes the preparation of monoclonal antibodies specific for Neisseria meningi tidis 22 kDa surface protein.
  • Exam le 3 describes the preparation of Neisseria meningitidis recombinant 22 kDa surface protein.
  • Example 4 describes the use of DNA probes for the identification of organisms expressing the Neisseria meningi tidis 22 kDa surface protein.
  • Example 5 describes the use of an anti-Neisseria meningi tidis 22 kDa surface protein monoclonal antibody to protect mice against Neisseria meningi tidis infection.
  • Example 6 describes the use of purified recombinant 22 kDa surface protein to induce a protective response against
  • Neisseria meningi tidis infection Neisseria meningi tidis infection.
  • Example 7 describes the identification of the sequence for the 22kDa protein and protein-coding gene for other strains of Neisseria meningi tidis (MCH88, and Z4063), and one strain of Neissria gonorrhoeae .
  • Example 8 describes the immunological response of rabbits and monkeys to the 22kDa Neisseria meningi tidis surface protein.
  • Example 9 describes the procedure used to map the different immunological epitopes of the 22kDa Neisseria meningi tidis surface protein.
  • Example 10 describes the induction by heat of an expression vector for the large scale production of the 22 kDa surface protein.
  • Example 11 describes a purification process for the 22kDa surface protein when produced by recombinant technology.
  • Example 12 describes the use of 22kPa surface protein as a human vaccine.
  • the antigenic determinants generated by the enzymatic treatments could then be identified by the subsequent analysis of the immunological and protective properties of these treated antigenic preparations.
  • Coomassie Blue is used to stain proteins and peptides and has no or very little affinity for the polysaccharides or lipids which are also key components of the outer membrane.
  • this low molecular weight antigen was stained by Coomassie blue suggested that at least part of it is made up of polypeptides that are not digested by proteolytic enzymes, or that are protected against the action of the enzymes by other surface structures. Moreover, as demonstrated below the very potent enzyme proteinase K did not digest this low molecular weight antigen even after extensive treatments. Lithium chloride extraction was used to obtain the outer membrane preparations from different strains of Neisseria meningi tidis and was performed in a manner previously described by the inventors [Brön et al. , Infect. Immun., 50, p. 510 (1985)].
  • the same outer membrane preparations were also treated with different concentrations (0.5 to 24 mg per mg of protein) of Proteinase K from Tri tirachium album limber (Sigma or Boehringer Mannheim, Laval, Canada) (E.C. 3.4.21.14) .
  • Tri tirachium album limber Sigma or Boehringer Mannheim, Laval, Canada
  • E.C. 3.4.21.14 Tri tirachium album limber
  • different experimental conditions were used. The samples were incubated for 1 hour, 2 hours, 24 hours or 48 hours at 37°C or 56°C with or without shaking.
  • the pH of the mixture samples was adjusted at either pH 7.2 or pH 9.0.
  • One % (vol/vol) of sodium dodecyl sulfate (SDS) was also added to certain samples .
  • Figure 2 presents the migration profile on 14% SDS- PAGE gel of the proteins present in outer membrane preparations derived from Neisseria meningi tidis strain 608B (B:2a:PI.2) after treatment at 37°C for 24 hours with ⁇ -chymotrypsin and trypsin. Extensive proteolytic digestion of the high molecular weight proteins and of several major outer membrane proteins can be observed for the treated samples ( Figure 2, lanes 3 and 4) compared to the untreated control ( Figure 2, lane 2) . On the contrary, a protein band with an apparent molecular weight of 22 kDa was not affected even after 24 hours of contact with either proteolytic enzyme.
  • Proteinase K is one of the most powerful proteolytic enzymes since it has a low peptide bond specificity and wide pH optimum. Surprisingly, the 22 kDa protein was resistant to digestion by 2 International Units (IU) of proteinase K for 24 hours at 56°C ( Figure 3, lane 2) . This treatment is often used in our laboratory to produce lipopolysaccharides or DNA that are almost free of proteins. Indeed, only small polypeptides can be seen after such an aggressive proteolytic treatment of the outer membrane preparation.
  • IU International Units
  • mice Female Balb/c mice (Charles River Laboratories, St- Constant, Quebec, Canada) were immunized with outer membrane preparations obtained from Neisseria meningi tidis strains 604A, 608B and 2241C respectively serogrouped A, B and C.
  • the lithium chloride extraction used to obtain these outer membrane preparations was performed in a manner previously described by the inventors. [Brön et al., Infect. Immun. 50, p. 510 (1985)] .
  • the protein content of these preparations were determined by the Lowry method adapted to membrane fractions [Lowry et al . , J. Biol. Chem. 193, p. 265 (1951)] .
  • Groups of mice were injected intraperitoneally or subcutaneously twice, at three-week intervals with 10 mg of different combinations of the outer membrane preparations described above.
  • the adjuvants used for the immunizations were either Freund's complete or incomplete adjuvant (Gibco Laboratories, Grand Island, N.Y.), or QuilA (CedarLane Laboratories, Hornby, Ont. , Canada) .
  • the immunized mice received a final intravenous injection of 10 mg of one of the outer membrane preparations described above .
  • the fusion protocol used to produce the hybridoma cell lines secreting the desired monoclonal antibody was described previously by the inventors [Hamel et al . , J . Med.
  • the proteins were transferred from the gels to nitrocellulose membranes • using a semi-dry apparatus (Bio-Rad) .
  • a current of 60 mA per gel (6X10cm) was applied for 10 minutes in the electroblot buffer consisting of 25 mM Tris-HCl, 192 ⁇ tfl glycine and 20% (vol/vol) methanol, pH 8.3.
  • the Western immunoblotting experiments clearly indicated that the monoclonal antibodies Me-1, Me-2, Me-3 , Me-5, Me-6 and Me- 7 recognized their specific epitopes on the Neisseria meningi tidis 22 kDa protein ( Figure 4A) .
  • the six monoclonal antibodies were reacted with 9 Neisseria meningi tidis strains (the serogroup of the strain is indicated in parentheses on Figure 5), 2 Neisseria gonorrhoeae strains ("NG”), 2 Moraxella catarrhalis strains ("MC”) and 2 Neisseria lactamica strains ("ML”) .
  • the radioimmunoassay confirmed that the epitopes recognized by the monoclonal antibodies are exposed at the surface of intact Neisseria meningi tidis isolates of different serotypes and serogroups and should also be accessible to the proteolytic enzymes (Figure 5) .
  • the recorded binding values (between 3,000 to 35,000 CPM), varied from one strain to another, and with the physiological state of the bacteria.
  • a Haemophilus influenzae porin-specific monoclonal antibody was used as a negative control for each bacterial strain. Counts below 500 CPM were obtained and subsequently subtracted from each binding value.
  • the results shown in Figure 5 for monoclonal antibodies Me-5 and Me-7 are representative of the results obtained with monoclonal antibodies Me-1, Me-2, Me-3 and Me-6.
  • the binding activities shown for Me-7 are representative of the binding activities obtained with other monoclonal antibodies that recognized the same bacterial strain.
  • a dot enzyme immunoassay was used for the rapid screening of the monoclonal antibodies against a large number of bacterial strains. This assay was performed as previously described by the inventors [Lussier et al. , J. Immunoassay, 10, p. 373 (1989)] . A collection of 71 Neisseria meningi tidis strains was used in this study.
  • the sample included 19 isolates of serogroup A, 23 isolates of serogroup B, 13 isolates of serogroup C, 1 isolate of serogroup 29E, 6 isolates of serogroup W-135, 1 isolate of serogroup X, 2 isolates of serogroup Y, 2 isolates of serogroup Z, and 4 isolates that were not serogrouped ("NS") .
  • These isolates were obtained from the Caribbean Epidemiology Centre, Port of Spain, Trinidad; Children's Hospital of Eastern Ontario, Ottawa, Canada; Department of Saskatchewan Health, Regina, Canada; Laboratoire de Sante Publique du Quebec, Montreal, Canada; Max-Planck Institut fur Molekulare Genetik, Berlin, FRG; Montreal Children Hospital, Montreal, Canada; Victoria General Hospital, Suite, Canada; and our own strains collection.
  • Neisseria gonorrhoeae 16 Neisseria gonorrhoeae, 4 Neisseria cinerea , 5 Neisseria lactamica, 1 Neisseria flava.
  • 1 Neisseria flavescens 3 Neisseria mucosa
  • 4 Neisseria per flava /sicca 4 Neisseria per flava
  • 1 Neisseria sicca 1 Neisseria su flava and 5 Moraxella catarrhalis
  • 1 Alcaligenes feacalis ATCC 8750
  • 1 CitroJacter freundii ATCC 2080
  • 1 Edwarsiella tarda ATCC 15947
  • Enterobacter cloaca ATCC 23355
  • 1 EnCerojbacter aerogenes ATCC 13048
  • 1 Escherichia coli 1 Fla obacterium odoratum
  • 1 Haemophilus influenzae type b Eagan strain
  • Klebsiella pneumonia 16
  • Neisserial species indicating that their specific epitope is also expressed by other closely related Neisseriaceae .
  • Me-1 reacted only with Neisseiria meningi tidis isolates. Me-1 was further tested with another sample of 177 Neisseria meningi tidis isolates and was able to correctly identify more than 99% of the total Neisseria meningi tidis strains tested. Besides the Neisseria strains presented in Table 1, the monoclonal antibodies did not react with any of the other bacterial species mentioned above.
  • Neisseria meningi tidis 22 kDa surface protein has no antigenic similarity with the lip protein, another low molecular weight and highly conserved protein present in the outer membrane of Neisseria meningitidis .
  • these monoclonal antibodies also reacted with the purified, recombinant 22 kDa surface protein produced after transformation of Escherichia coli strain BL21 (DE3) with a plasmid vector pNP2202 containing the gene coding for the Neisseria meningi tidis 22 kDa surface protein.
  • a LambdaGEM-11 genomic DNA library from Neisseria meningi tidis strain 608B (B:2a:PI.2) was constructed according to the manufacturer's recommendations (Promega CO, Madison, WI) . Briefly, the genomic DNA of the 608B strain was partially digested with Sau 3AI, and fragments ranging between 9 and 23 Kb were purified on agarose gel before being ligated to the Bam HI sites of the LambdaGEM- 11 arms . The resulting recombinant phages were used to infect Escherichia coli strain LE392 (Promega) which was then plated onto LB agar plates .
  • clone 8 which had a 13 Kb insert was selected for the subcloning experiments. After digestion of this clone with Sac I, two fragments of 5 and 8 Kb were obtained. These fragments were purified on agarose gel and ligated into the Sac I restriction site of the low copy number plasmid pWKS30 [Wang and Kushner, Gene, 100, p. 195 (1991)] . The recombinant plasmids were used to transform Escherichia coli strain JM109 (Promega) by electroporation (Bio-Rad, Mississauga, Ont.
  • Example 2 Western blot analysis (the methodology was described in Example 2) of the positive clones showed that the protein expressed by Escherichia coli was complete and migrated on SDS-PAGE gel like the Neisseria meningi tidis 22 kDa surface protein.
  • a clone containing the 8 Kb fragment was digested with Cla I and a 2.75 Kb fragment was then ligated into the Cla I site of the pWKS30 plasmid.
  • Western blot analysis of the resulting clones clearly indicated once again that the protein expressed by Escherichia coli was complete and migrated on SDS-PAGE gel like the native Neisseria meningi tidis 22 kDa surface protein.
  • two clones, designated PNP2202 and pNP2203 were shown to carry the 2.75 Kb insert in opposite orientations and were selected to proceed with the sequencing of the gene coding for the Neisseria meningi tidis 22 kDa surface protein.
  • nucleotide sequence revealed an open reading frame consisting of 525 nucleotides (including the stop codon) encoding a protein composed of 174 amino acid residues having a predicted molecular weight of 18,000 Daltons and a pi of 9.93.
  • the nucleotide and deduced amino acid sequences are presented in Figure 1 (SEQ ID NO:l; SEQ ID NO:2) .
  • the N-terminal amino acid sequence of the native 22 kDa surface protein derived from Neisseria meningi tidis strain 608B was determined in order to compare it with the amino acid sequence deduced from the nucleotide sequencing data.
  • Outer membrane preparation derived from Neisseria meningi tidis strain 608B was resolved by electrophoresis on a 14% SDS-PAGE gel and transferred onto a polyvinylidine difluoride membrane (Millipore Products, Bedford MA) according to a previously described method [Sambrook et al. , Molecular Cloning; a laboratory manual, Cold Spring Harbor Laboratory Press (1989)] .
  • the 22 kDa protein band was excised from the gel and then subjected to Edman degradation using the Applied Biosystems Inc . (Foster City, CA) model 473A automated protein sequencer following the manufacturer's recommendations.
  • the amino acid sequence E-G-A-S-G-F-Y-V-Q-A corresponded to amino acids 1-10 (SEQ ID NO:2) of the open reading frame, indicating that the Neisseria meningi tidis strain 608B, 22 kDa surface protein has a 19 amino acid leader peptide (amino acid residues -19 to -1 of SEQ ID NO:2) .
  • the gel slurry was poured into a chromatography column and washed extensively with 10 mM Tris-HCl buffer, pH 7.3 containing 0.05% Empigen BB (vol/vol) .
  • the recombinant 22 kDa protein was then eluted from the column with 1 M LiCl in 10 mM Tris-HCl buffer, pH 7.3.
  • the solution containing the eluted protein was dialyzed extensively against several liters of 10 mM Tris-HCl buffer, pH 7.3 containing 0.05% Empigen BB.
  • Coomassie Blue and silver stained SDS- Page gels [Tsai and Frasch, Analytical Biochem. , 119, pp.
  • transformed Escherichia coli cells can express the complete recombinant 22 kDa surface protein and that this protein is also highly resistant to the action of these three proteolytic enzymes as was the native protein found in Neisseria meningi tidis .
  • the purified recombinant 22 kDa surface protein which is not embedded in the outer membrane of Escherichia coli is still highly resistant to the action of the proteolytic enzymes.
  • N-terminal sequencing of the native protein confirmed that the Neisseria meningi tidis 22 kDa gene was indeed cloned; 3) this protein was not described previously; 4) it is possible to transform a host such as Escherichia coli and obtain expression of the recombinant Neisseria meningi tidis 22 kDa surface protein in high yield; 5) it is possible to obtain the recombinant protein free of other Neisseria meningi tidis molecules and almost free of components produced by Escherichia coli ;
  • the purified recombinant 22 kDa surface protein remains highly resistant to the action of proteolytic enzymes such as ⁇ -chymotrypsin, trypsin and proteinase K; and
  • EXAMPLE 4 Molecular Conservation Of The Gene Coding for the Neisseria meningitidis 22 kDa Surface Protein
  • a DNA dot blot hybridization assay was used to test different Neisseria species and other bacterial species.
  • the 525 base pair gene coding for the Neisseria meningitidis 22 kDa surface protein was amplified by PCR, purified on agarose gel and labeled by random priming with the non radioactive DIG DNA labeling •and detection system (Boehringer Mannheim, Laval, Canada) following the manufacturer's instructions.
  • the DNA dot blot assay was done according to the manufacturer's instructions (Boehringer Mannheim) . Briefly, the bacterial strains to be tested were dotted onto a positively charge nylon membrane (Boehringer Mannheim) , dried and then treated as described in the DIG System's user's guide for colony lifts. Pre- hybridizations and hybridizations were done at 42°C with solutions containing 50% formamide (Sigma) . The pre- hybridization solution also contained 100 mg/ml of denatured herring sperm DNA (Boehringer Mannheim) as an additional blocking agent to prevent non-specific hybridization of the DNA probe. The stringency washes and detection steps using the chemiluminescen lumigen PPD substrate were also done as described in the DIG System's user's guide.
  • the results obtained with monoclonal antibody Me-7 and the 525 base pair DNA probe were in perfect agreement. According to the results, all the Neisseria meningi tidis strains tested have the Neisseria meningi tidis 22 kDa surface protein gene and they express the protein since they were all recognized by the monoclonal antibody, thus confirming that this protein is highly conserved among the Neisseria meningitidis isolates (Table 2) .
  • the DNA probe also detected the gene coding for the Neisseria meningi tidis 22 kDa surface protein in all Neisseria gonorrhoeae strains tested.
  • the monoclonal antibody Me-7 reacted only with 2 out of the 16 Neisseria gonorrhoeae strains tested indicating that the specific epitope is somehow absent, inaccessible or modified in Neisseria gonorrhoeae strains, or that most of the Neisseria gonorrhoeae strains do not express the protein even if they have the coding sequence in their genome (Table 2) .
  • the 22kDa protein-coding gene of the Neisseria gonorrhoeae and Neisseria lactamica strains may be used for construction of recombinant plasmids used for the production of the 22kDa surface protein or analogs. All such protein or analogs may be used for the prevention, detection, or diagnosis of Neisseria infections. More particularly, such infections may be selected from infections from Neisseria meningi tidis , Neisseria gonorrhoeae, and Neisseria lactamica . Therefore, the 22kDa surface protein or analogs, may be used for the manufacture of a vaccine against such infections. Moreover, the 22kDa protein or analogs, may be used for the manufacture of a kit for the detection or diagnosis of such infections.
  • Neisserrial species and other bacte ⁇ al species were also tested with the two assays and gave negative results: 1 Neisseria cinerea, 1 Neisseria flava, 1 Neisseria flavescens, 2 Neisseria mucosa, 4 Neisseria perflava/sicca, 1 Neisseria perflava, 1 N. sicca, 1 N.
  • the DNA hybridization assay clearly indicated that the gene coding for the Neisseria meningi tidis 22 kDa surface protein is highly conserved among the pathogenic Neisseria . Furthermore, the results obtained clearly showed that this DNA probe could become a valuable tool for the rapid and direct detection of pathogenic Neisseria bacteria in clinical specimen. This probe could even be refined to discriminate between the Neisseria meningi tidis and Neisseria gonorrhoeae .
  • the bacteriolytic activity of the purified Neisseria meningi tidis 22 kDa surface protein-specific monoclonal antibodies was evaluated in vitro according to a method described previously [Brodeur et al . , Infect . Immun. , 50, p. 510 (1985) ; Martin et al . , Infect. Immun. , 60, p. 2718 (1992)] .
  • purified monoclonal antibodies Me-1 and Me-7 efficiently killed Neisseria meningi tidis strain 608B. Relatively low concentrations of each of these monoclonal antibodies reduced by more than 50% the number of viable bacteria.
  • mice were injected mtraperitoneally with 600 ml of ascitic fluid containing the monoclonal antibodies 18 hours before the bacterial challenge. The mice were then challenged with one ml of a suspension containing 1000 colony forming units of Neisseria meningi tidis strain 608B, 4% mucin (Sigma) and 1.6% hemoglobin (Sigma) .
  • Purified recombinant 22 kDa surface protein was prepared according to the protocol presented in Example 2 and was used to immunize Balb/c mice to determine its protective effect against challenge with a lethal dose of Neisseria meningitidis 608B (B:2a:P1.2) . It was decided to use the purified recombinant protein instead of the native meningococcal protein in order to insure that there was no other meningococcal antigen in the vaccine preparation used during these experiments .
  • the mouse model of infection used in these experiments was described previously by one of the inventors [Brön et al. , Infec . Immun. , 50, p. 510 (1985); Brön et al . , Can. J.
  • mice were each injected subcutaneously three times at three-week intervals with 100 ml of the antigen preparation containing either 10 or 20 ⁇ g per mouse of the purified recombinant 22 kDa surface protein.
  • QuilA was the adjuvant used for these experiments at a concentration of 25 ⁇ g per injection.
  • mice in the control groups were injected following the same procedure with either 10 or 20 ⁇ g of BSA, 20 ⁇ g of concentrated culture supernatant of Escherichia coli strain BL21(DE3) carrying the plasmid pWK ⁇ 30 without the insert gene for the meningococcal protein prepared as described in Example 3 , or phosphate- buffered saline. Serum samples from each mouse were obtained before each injection in order to analyze the development of the immune response against the recombinant protein.
  • mice in all groups were injected mtraperitoneally with 1 ml of a suspension containing 1000 colony forming units of Neisseria meningi tidis strain 608B in 4% mucin (Sigma) and 1.6% hemoglobin (Sigma) .
  • mice immunized with the purified recombinant 22 kDa surface protein survived the bacterial challenge compared to 0 to 42% in the control groups.
  • mice in the control group injected with concentrated Escherichia coli culture supernatant were not protected against the bacterial challenge. This latter result clearly demonstrated that the components present in the culture media and the Escherichia coli's antigens that might be present in small amounts after purification do not contribute to the observed protection against Neisseria meningi tidis .
  • Antibodies according to this invention are exemplified by murine hybridoma cell lines producing monoclonal antibodies Me-1 and Me-7 deposited in the
  • the 2.75 kb clal digested DNA fragment containing the gene coding for the 22kDa surface protein was isolated from the genomic DNA of the different strains of Neisseria meningi tidis and Neisseria gonorrhoeae as described in Example 3.
  • MCH88 strain The nucleotide sequence of strain MCH88 (clinical isolate) is presented in Figure S (SEQ ID NO:3 ) .
  • Z4063 strain The nucleotide sequence of strain Z4063 (Wang J. -F. et al . Infect. Immun., 60, p.5267 (1992)) is presented in Figure 9 (SEQ ID NO:5) . From experimental evidence obtained from strain 608B (Example 3), a putative leader sequence was deduced corresponding to amino acid - 19 to -1 (M-K-K-A-L-A-T-L-I-A-L-A-L-P-A-A-A-L-A) .
  • Neisseria gonorrhoeae strain b2 The nucleotide sequence of Neisseria gonorrhoeae strain b2 (serotype 1, Nat.Ref . Center for Neisseria, LCDC, Ottawa, Canada) is described in Figure 10 (SEQ ID NO:7) .
  • Figure 11 shows the consensus sequence established from the DNA sequence of all four strains tested.
  • the MCH88 strain showed an insertion of one codon (TCA) at nucleotide 217, but in general the four strains showed striking homology.
  • Figure 12 depicts the homology between the deduced amino acid sequence obtained from the four strains. There is greater than 90% identity between all four strains.
  • Rabbits and monkeys were immunized with the recombinant 22kDa protein to assess the antibody response in species other than the mouse.
  • the rabbits were injected subcutaneously and intramuscularly at several sites twice at three week intervals with 150 ⁇ g of one of the outer membrane preparations described above.
  • QuilA at a final concentration of 20% (vol. /vol.) (CedarLane Laboratories, Hornby, Ont. , Canada) , was the adjuvant used for these immunizations.
  • the development of the specific humoral response was analyzed by ELISA using outer membrane preparations extracted from Neisseria meningi tidis strain 608B (B:2a:PI.2) as coating antigen and by Western immunoblotting following methods already described by the inventors [Brön et al . , Infect. Immun.
  • Example 2 (described in Example 2), which is specific for the 22 kDa protein.
  • Neisseria meningitidis 22 kDa surface protein was epitope mapped using a method described by one of the inventors [Martin et al . Infect. Immun (1991) : 59:1457- 1464] . Identification of the linear epitopes was accomplished using 18 overlapping synthetic peptides covering the entire Neisseria meningi tidis 22 kDa protein sequence derived from strain 608B ( Figure 15) and hyperimmune sera obtained after immunization with this protein. The identification of immunodominant portions on the 22 kDa protein may be helpful in the design of new efficient vaccines. Furthermore, the localization of these B-cell epitopes also provides valuable information about the structural configuration of the protein in the outer membrane of Neisseria meningi tidis .
  • Synthetic peptides were purified by reverse-phase high- pressure liquid chromatography.
  • Peptides CS-845, CS-847, CS-848, CS-851, CS-852 and CS-856 were solubilized in a small volume of 6M guanidine-HCl (J.T. Baker, Ontario, Canada) or dimethyl sulfoxide (J.T.
  • peptides were then adjusted to 1 mg/ml with distilled water. All the other peptides were freely soluble in distilled water and were also adjusted to 1 mg/ml.
  • Peptide enzyme-linked immunosorbent assays were performed by coating synthetic peptides onto microtitration plates (Immulon 4, Dynatech Laboratories Inc., Chantilly, VA) at a concentration of 50 ⁇ g/ml in 50 mM carbonate buffer, pH 9.6.
  • Mouse and monkey antisera obtained after immunization with affinity purified recombinant 22 kDa protein were successfully used in combination with eighteen overlapping synthetic peptides to localize B-cell epitopes on the protein. These epitopes are clustered within three antigenic domains on the protein.
  • the first region is located between amino acid residues 51 and 86.
  • Computer analysis using different algorithms suggested that this region has the highest probability of being immunologically important since it is hydrophilic and surface exposed.
  • comparison of the four protein sequences which is presented in Figure 12 indicates that one of the major variation, which is the insertion of one amino acid residue at position 73 , is also located in this region.
  • the antisera identified a second antigenic domain located between amino acid residues 110 and 140. Interestingly, the sequence analysis revealed that seven out of the fourteen amino acid residues that are not conserved among the four protein sequences are clustered within this region of the protein.
  • Example 10 Heat-indueible expression vector for the large scale production of the 22 kDa surface protein
  • the gene coding for the Neisseria meningi tidis 22 kDa surface protein was inserted into the plasmid p629 [George et al. Bio/technology 5: 600-603 (1987)] .
  • a cassette of the bacteriophage ⁇ cI857 temperature sensitive repressor gene, from which the functional Pr promoter has been deleted, is carried by the plasmid p629 that uses the PL promoter to control the synthesis of the 22kDa surface protein.
  • the inactivation of the CI857 repressor by a temperature shift from 30°C to temperatures above 38°C results in the production of the protein encoded by the plasmid.
  • coli cells by a temperature shift is advantageous for large scale fermentation since it can easily be achieved with modern fermentors.
  • Other inducible expression vectors usually require the addition of specific molecules like lactose or isopropylthio- ⁇ -D- galactoside (IPTG) in the culture media in order to induce the expression of the desired gene.
  • IPTG isopropylthio- ⁇ -D- galactoside
  • a 540 nucleotide fragment was amplified by PCR from the Neisseria meningi tidis strain 608B genomic DNA using the following two oligonucleotide primers (0CRR8: 5'- TAATAGATCTATGAAAAAAGCACTTGCCAC-3 ' and OCRR9 : 3'-
  • a partial map of the plasmid pNP2204 is presented in Figure 16.
  • the resulting colonies were screened with Neisseria meningi tidis 22 kDa surface- protein specific monoclonal antibodies described in Example 2.
  • Western blot analysis of the resulting clones clearly indicated that the protein synthesized by E. coli was complete and migrated on SDS-PAGE gel like the native Neisseria meningi tidis 22 kDa surface protein.
  • Plasmid DNA was purified from the selected clone and then sequenced.
  • the nucleotide sequence of the insert present in the plasmid perfectly matched the nucleotide sequence of the gene coding for the Neisseria meningi tidis 22 kDa protein presented in Figure 1.
  • the temperature-indueible plasmid pNP2204 was used to transform the following E. coli strains: W3110, JM105, BL21, T0PP1, T0PP2 and T0PP3.
  • the level of synthesis of the 22 kDa surface protein and the localization of the protein in the different cellular fractions were determined for each strain. Shake flask cultures in LB broth (Gibco BRL, Life Technologies, Grand Island, NY) indicated that a temperature shift from 30°C to 39°C efficiently induced the expression of the gene.
  • Example 3 Since the vast majority of the 22 kDa protein is found embedded in the outer membrane of E. coli strains, the purification protocol presented in this Example is different from the one already described in Example 3 where a large amount of protein was released in the culture supernatant.
  • the bacterial cells were harvested by centrifugation at 8,000 xg for 15 minutes at 4°C and washed twice in phosphate buffered saline (PBS), pH 7.3.
  • the bacterial cells were ultrasonically broken (ballistic disintegration or mechanical disintegration with a French press may also be used) .
  • Unbroken cells were removed by centrifugation at 5,000 xg for 5 minutes and discarded.
  • the outer membranes were separated from cytoplasmic components by centrifugation at 100,000 xg for 1 h at 10°C.
  • the membrane-containing pellets were resuspended in a small volume of PBS, pH 7.3.
  • detergents such as Empigen BB (Calbiochem Co., LaJolla, CA) , Zwittergent-3, 14 (Calbiochem Co.) , or ⁇ - octylglucoside (Sigma) were used.
  • the detergent was added to the membrane fraction at final concentration of 3% and the mixture was incubated for 1 h at 20°C.
  • the non soluble material was removed by centrifugation at 100,000 xg for 1 h at 10°C.
  • the 22 kDa protein was efficiently solubilized by either three of the detergents, however ⁇ -octylglucoside had the advantage of easily removing several unwanted membrane proteins since they were not solubilized and could be separated from the supernatant by centrifugation.
  • the 22 kDa containing supernatant was dialyzed extensively against several changes of PBS buffer.Proteinase K treatment (as in Example 1) can be used to further remove unwanted proteins from the 22kDa surface protein preparation.
  • Differential precipitation using ammonium sulfate or organic solvents, and ultrafiltration are two additional steps that can be used to remove unwanted nucleic acid and lipopolysaccharide contaminants from the proteins before gel permeation and ion-exchange chromatography can be efficiently used to obtain the purified 22 kDa protein.
  • Affinity chromatography, as described in Example 3, can also be used to purify the 22 kDa protein.
  • Example 12 Use of 22kDa surface protein As a Human
  • 22kDa surface protein antigens may be selected from the polypeptides described herein.
  • one of skill in the art could design a vaccine around the 22kDa polypeptide or fragments thereof containing an immunogenic epitope.
  • the use of molecular biology techniques is particularly well-suited for the preparation of substantially pure recombinant antigens.
  • the vaccine composition may take a variety of forms. These include, for example, solid, semi-solid, and liquid dosage forms, such as powders, liquid solutions or suspensions, and liposomes. Based on our belief that the 22kDa surface protein antigens of this invention may elicit a protective immune response when administered to a human, the compositions of this invention will be similar to those used for immunizing humans with other proteins and polypeptides, e.g. tetanus and diphteria.
  • compositions of this invention will preferably comprise a pharmaceutically acceptable adjuvant such as incomplete Freund's adjuvant, aluminum hydroxide, a muramyl peptide, a water-in-oil emulsion, a liposome, an ISCOM or CTB, or a non-toxic B subunit form cholera toxin.
  • a pharmaceutically acceptable adjuvant such as incomplete Freund's adjuvant, aluminum hydroxide, a muramyl peptide, a water-in-oil emulsion, a liposome, an ISCOM or CTB, or a non-toxic B subunit form cholera toxin.
  • the compositions will include a water-in- oil emulsion or aluminum hydroxide as adjuvant.
  • composition would be administered to the patient in any of a number of pharmaceutically acceptable forms including intramuscular, intradermal, subcutaneous or topic.
  • the vaccine will be administered intramuscularly.
  • the dosage will consist of an initial injection,most probably with adjuvant, of about 0.01 to 10 mg, and preferably 0.1 to 1.0 mg of 22kDa surface protein antigen per patient, followed most probably by one or more booster injections.
  • boosters will be administered at about 1 and 6 months after the intial injection.
  • the ideal mucosal vaccine will be safely taken orally or intranasally as one or a few doses and would elicit protective antibodies on the appropriate surfaces along with systemic immunity.
  • the mucosal vaccine composition may include adjuvants, inert particulate carriers or recombinant live vectors.
  • the anti-22kDa surface protein antibodies of this invention are useful for passive immunotherapy and immunoprophylaxis of humans infected with Neisseria meninigi tidis or related bacteria such as Neisseria gonorrhoeae or Neisseria lactamica .
  • the dosage forms and regimens for such passive immunization would be similar to those of other passive immunotherapies.
  • An antibody according to this invention is exemplified by a hybridoma producing MAbs Me-1 or Me-7 deposited in the American Type Culture Collection in Rockville, Maryland, USA on July 21, 1995, and identified as Murine Hybridoma Cell Lines, Me-1 and Me-7 respectively. These deposits were assigned accession numbers HB 11959 (Me-1) and HB 11958 (Me-7) . While we have described herein a number of embodiments of this invention, it is apparent that our basic embodiments may be altered to provide other embodiments that utilize the compositions and processes of this invention. Therefore, it will be appreciated that the scope of this invention includes all alternative embodiments and variations that are defined in the foregoing specification and by the claims appended thereto; and the invention is not to be limited by the specific embodiments which have been presented herein by way of example.
  • MOLECULE TYPE DNA (genomic) (ill)
  • HYPOTHETICAL NO ⁇ iv)
  • ANTI-SENSE NO (vi) ORIGINAL SOURCE:
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • SEQUENCE DESCRIPTION SEQ ID NO: :
  • MOLECULE TYPE DNA (genomic)
  • ORGANISM Neisseria meningitidis
  • GGT TCT GCC AAA GGC TTC AGC CCG CGC ATC TCC GCA GGC TAC CGC ATC 375 Gly Ser Ala Lys Gly Phe Ser Pro Arg He Ser Ala Gly Tyr Arg He 25 30 35 AAC GAC CTC CGC TTC GCC GTC GAT TAC ACG CGC TAC AAA AAC TAT AAA 423 Asn Asp Leu Arg Phe Ala Val Asp Tyr Thr Arg Tyr Lys Asn Tyr Lys 40 45 50 GCC CCA TCC ACC GAT TTC AAA CTT TAC AGC ATC GGC GCG TCC GCC ATT 471 Ala Pro Ser Thr Asp Phe Lys Leu Tyr Ser He Gly Ala Ser Aia He 55 60 65
  • MOLECULE TYPE DNA (genomic)
  • HYPOTHETICAL NO
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis (3)
  • STRAIN 608B
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis
  • STRAIN 608B
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORIGINAL SOURCE
  • ORGANISM Neisseria meningitidis
  • MOLECULE TYPE protein
  • ORGANISM Neisseria meningitidis

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Abstract

La présente invention concerne un antigène ayant un degré de conservation élevé, accessible du point de vue immunologique, à la surface d'organismes de Neisseria meningitidis; des compositions immunothérapeutiques, prophylactiques et diagnostiques et des procédés utiles dans le traitement, la prévention et le diagnostic des maladies dues à Neisseria meningitidis; une proteine de surface de Neisseria meningitidis résistant à la proteinase K et ayant une poids moléculaire apparent de 22 kDa; les séquences correspondantes de nucléotides et d'aminoacides dérivés (SEQ ID : 1, 3, 5 et 7; 2, 4, 6 et 8); des procédés fondés sur l'ADN recombinant pour la production de la proteine de surface de Neisseria meningitidis de 22 kDa, et des anticorps qui se lient à elle.
PCT/CA1996/000157 1995-03-17 1996-03-15 Proteine de surface de neisseria meningitidis resistant a la proteinase k WO1996029412A1 (fr)

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MX9707061A MX9707061A (es) 1995-03-17 1996-03-15 Proteina con superficie resistente de proteinase k de neisseria meningitidis.
AU49343/96A AU716225B2 (en) 1995-03-17 1996-03-15 Proteinase K resistant surface protein of neisseria meningitidis
PL96322363A PL184373B1 (pl) 1995-03-17 1996-03-15 Izolowany polinukleotyd, sposób wytwarzania izolowanego polinukleotydu, zrekombinowana cząsteczka DNA i kompozycja farmaceutyczna zawierająca polinukleotyd
AT96905629T ATE431413T1 (de) 1995-03-17 1996-03-15 Proteinase k-resistentes oberflächen-protein aus neisseria meningitidis
SI9620035A SI9620035A (sl) 1995-03-17 1996-03-15 Membranski protein bakterije Neisseria meningitidis odporen proti proteinazi K
JP8527928A JPH11500624A (ja) 1995-03-17 1996-03-15 髄膜炎菌（Ｎｅｉｓｓｅｒｉａ Ｍｅｎｉｎｇｉｔｉｄｉｓ）のプロテイナーゼＫ抵抗性表面蛋白質
BRPI9607651-8B8A BR9607651B8 (pt) 1995-03-17 1996-03-15 Proteína de superfície de neisseria meningitidis resistente a proteinase k.
CA2215161A CA2215161C (fr) 1995-03-17 1996-03-15 Proteine de surface de neisseria meningitidis resistant a la proteinase k
NZ303118A NZ303118A (en) 1995-03-17 1996-03-15 Proteinase K resistant surface protein of Neisseria meningitidis and its use in treating Neisseria infections with a Neisseria-derived monoclonal antibody.
APAP/P/1997/001118A AP1027A (en) 1995-03-17 1996-03-15 Protein K resistant surface protein of neisseria meningitidis.
EP96905629A EP0815234B8 (fr) 1995-03-17 1996-03-15 Proteine de surface de neisseria meningitidis resistant a la proteinase k
DE69637929T DE69637929D1 (de) 1995-03-17 1996-03-15 Proteinase k-resistentes oberflächen-protein aus neisseria meningitidis
RO97-01730A RO117924B1 (ro) 1995-03-17 1996-03-15 Polipeptidă de suprafaţă a bacteriei neisseria meningitidis 608b, rezistentă la proteinaza k, polinucleotidă care o codifică şi compoziţie farmaceutică cu aceasta
EA199700248A EA001789B1 (ru) 1995-03-17 1996-03-15 Выделенные, по существу очищенные, поверхностные антигены белковой природы neisseria meningitidis и neisseria gonorrhoeae, их фрагменты и последовательности днк
SK1255-97A SK287456B6 (sk) 1995-03-17 1996-03-15 Povrchový proteín Neisseria meningitidis rezistentný voči proteináze K
NO19974264A NO326425B1 (no) 1995-03-17 1997-09-15 Immunogent Neisseria-celleoverflatepolypeptid og relaterte farmasoytiske sammensetninger, plynukleotider, antistoffer, anvendelser og relaterte sammensetninger og fremgangsmater.
HK99100097.4A HK1014991A1 (en) 1995-03-17 1999-01-08 Proteinase k resistant surface protein of neisseria meningitidis
US09/684,883 US7273611B1 (en) 1995-03-17 2000-10-06 Proteinase K resistant surface protein of neisseria meningitidis
US11/582,527 US7786286B2 (en) 1995-03-17 2006-10-16 Proteinase K resistant surface protein of Neisseria meningitidis
US11/929,886 US7776335B2 (en) 1995-03-17 2007-10-30 Proteinase K resistant surface protein of Neisseria meningitidis
US11/929,887 US7749499B2 (en) 1995-03-17 2007-10-30 Proteinase K resistant surface protein of Neisseria meningitidis
US11/929,902 US20080107676A1 (en) 1995-03-17 2007-10-30 Proteinase k resistant surface protein of neisseria meningitidis
US11/929,893 US7833717B2 (en) 1995-03-17 2007-10-30 Proteinase K resistant surface protein of Neisseria meningitidis
US11/929,890 US20080107674A1 (en) 1995-03-17 2007-10-30 Proteinase k resistant surface protein of neisseria meningitidis
US11/929,892 US20080124353A1 (en) 1995-03-17 2007-10-30 Proteinase k resistant surface protein of neisseria meningitidis

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US08/406,362 1995-03-17
US198395P 1995-08-04 1995-08-04
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BR9607651A (pt) 1998-11-17
IL117483A0 (en) 1996-07-23
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